OK...I have had some of you recommend Lifeline and Hairy Bear on my Reg. Charolais heifer. I do plan on using these bulls later in her production life. My question is, how safe are these bull on heifers? My females are fed coastal grass/hay, mineral, and sweet feed/cubes a few times a week(about 2 times on a good week). Of course, when it is calving time, all of my heifers will be monitored very closely. How comfortable would you be using Lifeline or Hairy Bear on your heifers with that feed regimen? Any information and/or opinions are greatly appriciated!!